by the consultants. bob beckel has counseled hundreds of candidates. >> it's theater of politics and trying to get people come into the theater and take a look and see if they like your play. >> john: here in cleveland the romney campaign is preparing. they are trying to get lots of people to watch. >> let's tighten that out a little bit. >> one presidential campaign in the fall involves 400 people, advance people, setting up the stage. >> check, one, two. >> a presidential campaign stop involves a lot of hard work. >> john: most are paid to do this. some are volunteers. the planning starts days early. >> we send people driving around and asking people, can we use campus green. >> bill ritter is director of operations for mitt romney. campaign staff make sure the right number of people show up. hillary clinton's campaign was run by patty. >> you make phone calls. you do robo calls. >> john: hillary is going to be here. do they show up? >> yes. >> john: they even advertise in the sky. >> see if the plane company can do this flash. >> john: because if the arena is bigger than the crowd it looks bad.